Total duration of exposure. The integration time multiplied by the number of integrations (seconds). NOTE: This keyword is present for backward compatibility with ground system software. Where possible, use the FITS Standard keyword TELAPSE for this quantity.
| Attribute | Value |
|---|---|
| data type | float |
| enumerated Values | not defined |
| units | seconds |
| example | 3999.632 |
| default value | |
| special processing | VALUE_REQUIRED |
| source | Observatory Status File (OSF) |
| software source | METRICS:completedExposure.exposureTime |
| calculation | TOTAL_PHOTON_COLLECTION_TIME+TFRAME*(DROPFRAMES3*NINTS+NRSTSTRT+NRESETS*(NINTS-1)), where TOTAL_PHOTON_COLLECTION_TIME = TFRAME*((NGROUPS*NFRAMES+(NGROUPS-1)*GROUPGAP+DROPFRAMES1)*NINTS) and DROPFRAMES1, DROPFRAMES3 are lookups in the PRD DataModes table |
| DB destination | ['ScienceCommon.duration'] |
| data type in DB | float |
| instrument | Multiple |
| mode | All |
| product level | 1b |
| FITS hdu | PRIMARY |
| FITS header section | Exposure |